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A balloon filled with helium gas at 20C occupies 2.91 L at 1.00 atm. The balloon is immersed in liquid nitrogen at -196C, raising the pressure to 5.20 atm. What is the volume of the balloon in the liquid nitrogen?
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Describe how to assign a Oxidation number from the text: The oxidation number of an atom in an elemental substance is zero. The oxidation number of a monatomic ion is equal to the ion's charge. Oxidation numbers for comm ...
An 18g ice cube initially at -10C is dropped into 120 g of water initially at 25C. What is the final temperature of the system after all of the ice has melted? Use the data provided in the reference data sheet and assume ...
If 0.050 mol hydrochloric acid (HCl) is mixed with 0.050 mol of sodium hydroxide (NaOH) in a "coffee cup" calorimeter, calculate the temperature change of 34.6 g of the resulting solution if the specific heat of the solu ...
An analysis of an oxide of nitrogen with a molecular weight of92.02 amu gave 69.57% oxygen and 30.43 % nitrogen. What is the empirical formula of the compound?
Calculate volume in milliliters of a 1.96 mol/L calcium bromide solution that contains 275. mmol of calcium bromide CaBr2. Round your answer to 3 significant digits.
Cesium-137 has a half-life of 30.17 years. The first atomic explosion at Trinity Site in New Mexico in 1945 generated significant amounts of cesium-137. It has been 73 years since this detonation. What fraction of the ce ...
Consider two acids HCN and HNO2: HNO2 + H2O NO2- + H3O+ Ka = 5.1 x 10-4 HCN + H2O CN- + H3O+ Ka = 2.1 x 10-9 Which of the following statements is/are true? A ...
15 grams of NaCl is dissolved completely in a beaker containing 200mL of water. What is the Na+ concentration in moles/liter in the final solution?
Name five types of radiation. Describe, in table form, their mass number, charge, and identity.
How many moles of magnesium ion are present in 5.25g Mg 3 (PO 4 ) 2 ?
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